Deconstructed Holiday Turkey with Sage Gravy

Name: Deconstructed Holiday Turkey with Sage Gravy
Ingredients: 1 (6 1/2 to 7 pound) turkey breast on the bone; 3 turkey drumsticks (about 2 1/4 pounds total); 2 turkey thighs (about 1 1/2 pounds total); 1/4 cup kosher salt; 1/4 cup honey; 1 head garlic, cut in half (do not peel); 2 dried bay leaves; 4 sprigs fresh thyme; 2 large whole sprigs fresh sage; 2 teaspoons whole black peppercorns; 2 teaspoons allspice berries; 1/4 cup fresh celery leaves (from 1 bunch); 3 tablespoons unsalted butter, melted; Leaves from 2 large sprigs sage, plus several whole sprigs for garnish; 2 to 3 cups low-sodium chicken broth; 1/4 cup (1/2 stick) unsalted butter; 1/3 cup all-purpose flour; Kosher salt; Freshly ground black pepper